KR20190113636A - Auxiliary instrument and three-dimensional image data creation method using auxiliary instrument - Google Patents

Abstract

The present invention improves the accuracy and degree of precision of image data in intra-oral three-dimensional. According to the present invention, an assistance device (10), which is a dental assisting device used as a criterion for positioning to connect a plurality of pieces of three-dimensional image data obtained by intra-oral three-dimensional measurement to each other and create intra-oral three-dimensional image data, comprises: a sheet unit (11) having a first surface and a second surface facing the first surface; and a plurality of identification units (12) formed in a thickness direction (Z direction) of the sheet unit (11) from the first surface of the sheet unit (11) and respectively having an identifiable three-dimensional shape.

Description

AUXILIARY INSTRUMENT AND THREE-DIMENSIONAL IMAGE DATA CREATION METHOD USING AUXILIARY INSTRUMENT}

The present invention relates to an auxiliary mechanism and a method for creating three-dimensional image data using the auxiliary mechanism. In particular, the present invention is arranged in the oral cavity when performing three-dimensional measurement in the oral cavity, and is used as a criterion for positioning to connect the plurality of three-dimensional image data measured in three dimensions to create three-dimensional intraoral image data. A three-dimensional image data creation method using a mechanism and an auxiliary mechanism.

Markers for creating three-dimensional tomography images from three-dimensional oral region tomography data of the patient's oral cavity area and appearance data of the patient's orthodontic model, and methods of creating three-dimensional tomography images using the markers are known (for example, , Patent Document 1).

In the creation method of the three-dimensional tomography image of patent document 1, a marker is arrange | positioned in the oral region of a patient, and three-dimensional oral region tomography data and three-dimensional image data of an orthodontic model are acquired. And in the creation method of the three-dimensional tomography image of patent document 1, alignment of the said two data is carried out by aligning three-dimensional oral region tomography data and three-dimensional image data of an orthodontic model based on the position of a marker. This three-dimensional tomography image is produced.

In recent years, a method of creating three-dimensional intraoral image data by connecting a plurality of three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity is known.

Japanese Unexamined Patent Publication No. 2009-233294

In a method of creating three-dimensional intraoral image data by connecting a plurality of three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity, it is required to improve the accuracy and precision of the three-dimensional intraoral image data.

An object of the present invention is to provide an auxiliary mechanism capable of improving the accuracy and precision of three-dimensional image data and a three-dimensional image data creation method using the auxiliary mechanism.

An auxiliary mechanism according to one aspect of the present invention,

A dental assisting device used as a criterion for positioning for connecting three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity to each other to create three-dimensional intraoral image data.

A sheet portion having a first surface and a second surface opposite to the first surface,

It is provided in the thickness direction of the said sheet part from the said 1st surface of the said sheet part, and is provided with the some identification part which has the three-dimensional shape which can respectively identify.

Three-dimensional image data creation method using the auxiliary mechanism according to an aspect of the present invention,

A three-dimensional image data creation method for creating three-dimensional intraoral image data using a dental assistive device,

The part which overlaps the oral cavity area | region in which the sheet | seat part and the auxiliary mechanism provided in the thickness direction of the said sheet part from the said 1st surface of the said sheet part, and equipped with the some identification part which has the three-dimensional shape which can each identify is arrange | positioned is overlapped. Acquiring a plurality of three-dimensional image data in which the auxiliary apparatus and the shape in the oral cavity are three-dimensionally measured by three-dimensional measurement while including;

Identifying the shapes of the plurality of identification portions of the auxiliary mechanism in each of the plurality of three-dimensional image data,

Specifying one or a plurality of identification units having an approximate shape in the overlapping portions of the plurality of three-dimensional image data,

Positioning the plurality of three-dimensional image data by using the specified one or a plurality of identification units as a reference for positioning;

A step of creating three-dimensional intraoral image data by connecting the plurality of aligned three-dimensional image data to each other.

According to the auxiliary mechanism of the present invention and the three-dimensional image data creation method using the auxiliary mechanism, the accuracy and precision of the three-dimensional intraoral image data can be improved.

1 is a schematic view showing an example of an auxiliary mechanism according to Embodiment 1 of the present invention.
It is a schematic diagram which shows the auxiliary mechanism of the modification which concerns on Embodiment 1 of this invention.
It is a schematic diagram which shows the auxiliary mechanism of the other modified example which concerns on Embodiment 1 of this invention.
4 is a diagram illustrating an example of a sentence.
5 is a diagram illustrating an example of a pattern.
6 is a diagram illustrating an example of a symbol.
7 is a diagram illustrating an example of a form.
8 is a flowchart of an example of a method of manufacturing an auxiliary appliance according to Embodiment 1 of the present invention.
9 is a flowchart of another example of the method of manufacturing the auxiliary mechanism according to the first embodiment of the present invention.
10 is a flowchart of an example of a three-dimensional image data creation method using the auxiliary mechanism according to the first embodiment of the present invention.
It is a figure which shows a part of exemplary process of a three-dimensional image creation method.
It is a figure which shows a part of exemplary process of a three-dimensional image creation method.
12 is a flowchart of an example of a method for aligning three-dimensional oral region tomography data and three-dimensional intraoral image data using the assisting apparatus according to Embodiment 1 of the present invention.
FIG. 13 is a diagram showing three-dimensional image data created by the three-dimensional image data creation method using the auxiliary mechanism as the first embodiment.
FIG. 14 is a diagram showing three-dimensional image data created without using an auxiliary mechanism as Comparative Example 1. FIG.
FIG. 15 is a diagram showing a distance measured in order to evaluate the accuracy of the three-dimensional image data of Example 1. FIG.
It is a perspective view which shows the auxiliary mechanism of the other modified example which concerns on Embodiment 1 of this invention.
It is a figure which shows an example of the state which mounted the auxiliary apparatus of a modified example in the mouth of a patient.
It is a figure which shows another example of the state which attached the auxiliary apparatus of a modification to the mouth of a patient.
19 is a perspective view showing another modification of the auxiliary mechanism according to the first embodiment of the present invention.

(The process which arrived at this invention)

In the dental clinic, dental practitioners are producing models of the patient's teeth, mucous membranes and abutments to obtain information of the patient's intraoral shape. For example, dental practitioners produce shapes such as teeth, mucous membranes and abutments of patients with alginate impression materials or silicone impression materials (hereinafter referred to as "impression acquisition"). Next, the dental practitioners inject the plaster into the produced mold and harden it to produce a model of a tooth, mucosa and abutment.

In the impression acquisition method, there is a problem that pain such as vomiting reflection, thermal stimulation, and waiting for the hardening of the impression material while the impression is taken occurs in the patient, or infectious disease is transmitted to the dental care worker via the impression material. .

In order to solve such a problem, it is required to acquire information, such as a three-dimensional shape in the oral cavity of a patient, using a non-contact optical scanner as an intraoral digital impression acquisition apparatus, for example. In addition, in this specification, an "intraoral digital impression taking apparatus" may be called "a raise taking apparatus."

In addition, it is required to produce a prosthetic device by machining with a dental CAD / CAM system using three-dimensional image data obtained by the impression taking device, thereby realizing an improvement in productivity, uniformity of quality and a shortening of treatment period. It is becoming.

The dental CAD / CAM system includes, for example, a measuring device, a design device, and / or a processing device to fabricate a prosthetic device by machining. Dental CAD / CAM systems using an impression acquisition device have been clinically applied in the US and Europe since 1985.

However, the dental CAD / CAM system using the impression taking device is inlayed and / or due to the three-dimensional measurement accuracy of the impression taking device, the viewpoint of the processing accuracy of the processing machine, and the reason that there are few dental materials that can be processed by the processing device. It is only used for prosthetic treatment of one tooth such as a crown.

The impression taking device is a device which three-dimensionally measures the inside of the oral cavity while irradiating LED light or laser light, detects the light reflected from the surface of the tooth with a scanner, and creates continuous three-dimensional image data by dedicated software.

The three-dimensional shape measurement method by the impression taking device includes confocal method, active triangulation method, optical coherence tomography method, active waveform sampling method, moire tomography method, the combination of stereoscopic and line projection, the combination of stereo imaging and structured light projection. Laws are adopted.

As an attribute of the impression taking device, the area that can be measured in three dimensions becomes smaller as it enters the mouth of a person, and the range that can be measured in three dimensions in one shot is limited. For this reason, the impression acquisition apparatus produces | generates continuous three-dimensional image data by acquiring several 3D image data continuously, and connecting several 3D image data. Specifically, the impression acquisition apparatus connects a plurality of three-dimensional image data measured in three dimensions to each other by dedicated software. For example, the impression acquisition apparatus detects a portion of each of the plurality of three-dimensional image data approximated by the exclusive software. The impression taking apparatus creates three-dimensional image data by connecting a plurality of three-dimensional image data to each other, using the detected approximation as a reference for alignment. In this case, in the impression taking apparatus, an error may occur in detection of a portion of which the three-dimensional shape is approximated in the plurality of three-dimensional image data. For this reason, there is a problem in that a plurality of three-dimensional image data cannot be accurately aligned and connected to each other.

In recent years, the improvement of the three-dimensional image processing capability of the computer and the optimization of the three-dimensional measurement path have made it possible to connect continuous three-dimensional images of the arch form without damaging data in the dental clinic. However, in a plurality of three-dimensional image data measured three-dimensionally within the three-dimensional measurement range of one shot 25.00 mm 2 or more and 625.00 mm 2 or less, it is difficult to improve the accuracy and accuracy of detection of the portion approximated by the three-dimensional shape. For this reason, even if the detected approximate three-dimensional shape part is used as a criterion of alignment, it is difficult to align and connect a plurality of three-dimensional image data with high accuracy and accuracy. For example, it is difficult to precisely position and connect a plurality of three-dimensional image data of three-dimensional measurement of an edentulous jaw, an isolated tooth abutment, a bridge abutment, an anterior tooth abutment, a facial defect, and the like having an approximate three-dimensional shape. For this reason, from the viewpoint of the manufacturing precision of a prosthetic device, the case where the application of the impression taking device is limited to a small three-dimensional measurement range such as a crown or an inlay is a phenomenon.

In the future, when it becomes possible to accurately and accurately acquire three-dimensional image data such as an oral cavity area, an implant scan body, and a face, it is expected that the application case of the dental CAD / CAM system in which the impression taking device is one of the components will be widened. It is expected. When the application case of the dental CAD / CAM system using the impression taking device becomes wider, the transition from the manufacture of the prosthetic device by hand to the production of the prosthetic device using the dental CAD / CAM system proceeds. As a result, in the production of the prosthetic device, work efficiency and quality can be made uniform, and it is possible to contribute to shortening the treatment period of the dental disease patient and reducing the work burden of the dental healthcare worker.

In addition, with the advancement and digitization of dental medical technology, three-dimensional oral region tomography data such as patient-specific nerve movement, alveolar bone thickness and jaw joint obtained by computed tomography (MCT) / magnetic resonance imaging (MRI) and Accurate positioning of the patient's oral cavity area three-dimensional image data obtained by CT, the oral cavity area model obtained by the pore desktop scanner, and the digital impression acquisition is required. In addition, it is required to simply modify the dimensions of the three-dimensional oral region tomography data to an accurate size. In addition, the present invention is not only applied to various treatment simulations in virtual reality, but also used in the production of an actual prosthetic device or surgical guide by using the data precisely aligning the three-dimensional oral region tomography data and the three-dimensional oral region data. Application is also required.

Thus, the present inventors have attained the following inventions.

An auxiliary mechanism according to one aspect of the present invention,

A dental assisting device used as a criterion for positioning for connecting three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity to each other to create three-dimensional intraoral image data.

A sheet portion having a first surface and a second surface opposite to the first surface,

It is provided in the thickness direction of the said sheet part from the said 1st surface of the said sheet part, and is provided with the some identification part which has the three-dimensional shape which can respectively identify.

In the auxiliary mechanism, the plurality of identification portions,

A convex portion protruding from a direction toward the second surface from the first surface of the sheet portion;

A recess recessed toward the second surface from the first surface of the seat portion, and

You may have the shape of at least 1 of the hole which communicates the said 1st surface and said 2nd surface of the said sheet part.

In the said auxiliary mechanism, the shape of the identification part which adjoins mutually among the said some identification part may differ.

In the auxiliary mechanism, the plurality of identification parts may have at least one shape among letters, numbers, symbols, drawings, figures, sentences, patterns, symbols, and shapes.

In the auxiliary mechanism, each of the plurality of identification portions has a dimension in the thickness direction of the sheet portion of 0.10 mm or more and 3.00 mm or less, and a dimension in the longitudinal direction and the width direction when viewed in the thickness direction of the sheet portion. May be formed 0.10 mm or more and 20.00 mm or less.

In the said auxiliary mechanism, you may be formed from the material which contains the coloring agent in which the biosafety was confirmed, and added the X-ray contrast agent.

In the said auxiliary mechanism, the said sheet part may have a rectangular shape whose thickness is 0.10 mm or more and 3.00 mm or less, and the dimension in the longitudinal direction and the width direction is 1.00 mm or more and 200.00 mm or less when viewed from the thickness direction of the said sheet part.

In the auxiliary mechanism, the sheet portion has a semicircular shape when viewed in the thickness direction of the sheet portion,

The arcuate outer edge part in the said sheet part may be bent toward the said 2nd surface from the said 1st surface of the said sheet part.

In the auxiliary mechanism, in a cross section formed by bending in a U shape when viewed in the thickness direction of the sheet portion, and cutting the sheet portion in the thickness direction, a direction from the second surface of the sheet portion toward the first surface. May have a concave cross-sectional shape.

In the said assistive device, the lip part which opens and fixes the lips of a patient,

A corner portion connected to the cleft lip and the connecting portion and further fixed to open the mouth of the patient;

A handle portion connected to the corner portion and capable of being gripped,

The sheet portion may be connected to the lip portion and / or the angular portion, and may extend from the lip portion and / or the angular portion toward the oral cavity.

The auxiliary mechanism includes a maxillary occlusal image and a mandibular occlusal image suitable for the maxillary bite image,

The maxillary occlusal image,

A first base upper portion having a first plate suitable for the shape of the oral mucosa of the patient's maxilla and the sheet portion with the plurality of identification portions extending from the cross section of the first plate to the oral mucosa side of the patient's maxilla;

A first occlusal agent disposed on the maxillary alveoli and connected to the first plate of the first base upper portion,

The plurality of identification portions are formed in a cross section of the first occlusal agent portion.

The mandibular occlusal image,

A second base upper portion having a second plate suitable for the shape of the lower mouth oral mucosa of the patient and the sheet portion formed with the plurality of identification portions extending from the cross section of the second plate to the oral mucosa side of the patient's lower jaw;

A second occlusal agent disposed on the lower alveolar and connected to the second plate of the second base upper portion;

The plurality of identification portions may be formed in the cross section of the second occlusal agent portion.

The three-dimensional image data creation method of one aspect of the present invention,

A three-dimensional image data creation method for creating three-dimensional intraoral image data using a dental assistive device,

A sheet portion having a first surface and a second surface opposite to the first surface, and a plurality of identification portions formed in the thickness direction of the sheet portion from the first surface of the sheet portion, and each having a three-dimensional shape that can be identified. Obtaining three-dimensional image data in which the auxiliary apparatus and the shape in the oral cavity are three-dimensionally measured together by three-dimensional measurement of the oral cavity area in which the auxiliary mechanism to be provided includes overlapping portions;

Identifying each of the plurality of three-dimensional image data, each of the shapes of the plurality of identification portions of the auxiliary mechanism;

Specifying one or a plurality of identification units having an approximate shape in the overlapping portions of the plurality of three-dimensional image data,

Positioning the plurality of three-dimensional image data by using the specified one or a plurality of identification units as a reference for positioning;

A step of creating three-dimensional intraoral image data by connecting the plurality of aligned three-dimensional image data to each other.

Positioning method of one aspect of the present invention,

As a method of aligning three-dimensional oral region tomography data and three-dimensional intraoral image data using a dental assistive device,

A sheet portion having a first surface and a second surface opposite to the first surface, and a plurality of identification portions formed in the thickness direction of the sheet portion from the first surface of the sheet portion, and each having a three-dimensional shape that can be identified. Obtaining three-dimensional image data in which the auxiliary apparatus and the shape in the oral cavity are three-dimensionally measured together by three-dimensional measurement of the oral cavity area in which the auxiliary mechanism to be provided includes overlapping portions;

Identifying the shapes of the plurality of identification portions of the auxiliary mechanism in each of the plurality of three-dimensional image data,

Specifying one or a plurality of identification units having an approximate shape in the overlapping portions of the plurality of three-dimensional image data,

Positioning the plurality of three-dimensional image data by using the specified one or a plurality of identification units as a reference for positioning;

Creating three-dimensional intraoral image data by connecting the plurality of three-dimensional image data aligned;

Acquiring three-dimensional oral cavity tomography data by CT scanning the oral cavity area in which the auxiliary mechanism is arranged;

In each of the three-dimensional intraoral image data and the three-dimensional oral region tomography imaging data, the three-dimensional oral image data and the three-dimensional oral region tomography so that the dimensions of one or a plurality of identification portions become known dimensions. Step of correcting the dimensions of the shooting data,

And positioning the corrected intraoral three-dimensional image data and three-dimensional oral region tomography data based on the one or the plurality of identification units.

EMBODIMENT OF THE INVENTION Hereinafter, this invention is demonstrated, referring drawings. In all the following figures, the same code | symbol is attached | subjected to the same or equivalent part, and the overlapping description is abbreviate | omitted.

(Embodiment 1)

[aids]

The assistive device is a dental assistive device used as a reference for creating three-dimensional intraoral image data by connecting a plurality of three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity. Three-dimensional intraoral image data is image data which shows the three-dimensional shape in the oral cavity of a patient.

1 is a schematic view showing an example of the auxiliary mechanism 10 according to Embodiment 1 of the present invention. X, Y, and Z direction in FIG. 1 represent the horizontal direction, the vertical direction, and the thickness direction of the auxiliary | assistant mechanism 10, respectively. As shown in FIG. 1, the auxiliary mechanism 10 includes a sheet portion 11 and a plurality of identification portions 12 formed in the sheet portion 11.

Hereinafter, the configuration of the auxiliary mechanism 10 will be described in detail.

<Sheet part>

The sheet portion 11 is formed of a sheet-like member. Specifically, the sheet portion 11 is formed of a thin sheet-like member having a first surface and a second surface opposite to the first surface, and has a rectangular shape when viewed in the thickness direction, that is, the Z direction. In addition, in Embodiment 1, although the 1st surface is made into the upper surface of the sheet part 11, and 2nd surface is described as the lower surface of the sheet part 11, it is not limited to this. The lower surface of the sheet portion 11 may be the first surface, and the second surface may be the upper surface of the sheet portion 11.

In addition, the sheet part 11 is formed with the material which can be elastically deformed. For this reason, according to the shape in the oral cavity of a patient, or the shape of a model, the auxiliary mechanism 10 can be deformed and arrange | positioned in an oral cavity.

In addition, the sheet part 11 is formed with the material from which the biosafety was confirmed. Thereby, even if it arrange | positions in an oral cavity, it can suppress that adversely affects a human body.

The sheet portion 11 is formed of a material to which an X-ray contrast agent is added. Thereby, even when carrying out CT scan of the oral cavity, the auxiliary mechanism 10 can be measured three-dimensionally. On the other hand, in the auxiliary mechanism 10, the X-ray contrast agent is not an essential structure.

The seat part 11 is formed in the sheet form which can be arrange | positioned in the oral cavity or a model of a patient. For example, the sheet portion 11 may have a shape such as a triangle, a rectangle, a rhombus, a circle, an ellipse, or a semicircle.

In Embodiment 1, as an example, the sheet part 11 is formed in substantially square shape as seen from the thickness direction. The sheet part 11 is 0.1 mm or more and 3.0 mm or less in thickness, for example. Moreover, the sheet | seat part 11 is 1.00 mm or more and 200.00 mm or less in the longitudinal direction and the width direction as viewed from the thickness direction. In the present specification, the longitudinal direction means the X direction, and the width direction means the Y direction.

In addition, the shape of the sheet | seat part 11 is not limited to substantially square, The shape corresponding to the shape in the oral cavity of a patient may be sufficient. 2 is a schematic view of the auxiliary mechanism 10A in a modification. As shown in FIG. 2, in the auxiliary mechanism 10A, the outer edge portion 13 of the sheet portion 11a is formed to cover the gum region of the patient. The gum region is a region of a part of the oral mucosa and surrounds the root of the tooth.

Specifically, the sheet portion 11a is formed in a semicircular shape. The curved portion at the outer edge of the sheet portion 11a is bent in the thickness direction of the sheet portion 11. Specifically, the outer edge part 13 which is circular arc shape in the sheet | seat part 11a is bent toward the 2nd surface (lower surface) from the 1st surface (upper surface) of the sheet | seat part 11. As shown in FIG. Moreover, the center part 14 of the sheet | seat part 11a is dug in the direction toward a 2nd surface from a 1st surface.

3 is a schematic view of an auxiliary mechanism 10B of another modification. As shown in FIG. 3, in the auxiliary mechanism 10B, the sheet | seat part 11b is formed so that the gum of a patient may be covered. Specifically, the sheet portion 11b is formed to be bent in a U shape when viewed in the thickness direction of the sheet portion 11b, and the sheet portion 11b is formed in a cross section obtained by cutting the sheet portion 11b in the thickness direction. It may have a concave cross-sectional shape which is recessed in the thickness direction of ie, ie, the direction from the second surface to the first surface.

Thus, by providing the seat parts 11a and 11b so that the patient's gums may be covered, it becomes easy to arrange | position the auxiliary mechanism 10A, 10B in an oral cavity.

<Plural identification parts>

Returning to FIG. 1, the some identification part 12 is formed in the thickness direction of the sheet part 11, ie, Z direction, from the 1st surface (upper surface) of the sheet part 11, and also identifies the three-dimensional shape which can be distinguished, respectively. Have

The "three-dimensionally-identifiable three-dimensional shape" means that the several three-dimensional shape shown by the some three-dimensional image data measured three-dimensionally by the impression taking apparatus can be identified by a control apparatus, respectively.

The control device is, for example, a computer that stores a plurality of three-dimensional image data measured three-dimensionally by the impression taking device, and connects the plurality of three-dimensional image data to each other to create three-dimensional intraoral image data. The control device also controls the impression taking device. The control apparatus may be included in the pulling apparatus or may be configured separately from the pulling apparatus. In Embodiment 1, a control apparatus is comprised separately from an impression taking apparatus.

The control device has one or more processors and a memory.

One or more processors are, for example, a central processing unit (CPU), a microprocessor, or other processing unit capable of executing computer executable instructions. The processor is capable of executing instructions stored in memory.

The memory stores the data of the control device. The memory may include, for example, computer recording media, such as RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, DVD or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other. Magnetic storage device, or any medium that can be used to store desired information and that can be accessed by a control device.

The memory stores a plurality of three-dimensional image data three-dimensionally measured by the impression acquisition device. The memory also stores a program for executing a method of creating three-dimensional intraoral image data by connecting a plurality of three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity based on the auxiliary mechanism 10.

The plurality of identification parts 12 are formed from the first surface of the seat portion 11 and the convex portions protruding in the direction opposite to the direction toward the second surface (lower surface) from the first surface (upper surface) of the sheet portion 11. At least one shape of the recessed part which dug toward two surfaces or the hole which communicates the 1st surface and 2nd surface of the sheet part 11 is included. Alternatively, the plurality of identification portions 12 may be a combination of at least two or more of convex portions, recesses, and holes.

In the auxiliary mechanisms 10, 10A, and 10B shown in Figs. 1 to 3, each of the plurality of identification portions 12 protrudes in a direction opposite to the direction from the first surface of the sheet portion 11 toward the second surface. It is formed negatively. The plurality of identification parts 12 are arranged regularly at intervals in the X direction and the Y direction of the sheet part 11, respectively. Moreover, it is preferable that the shape of the identification part which adjoins mutually among the some identification part 12 is different. By this structure, it becomes easy to identify each of the some identification part 12 by a control apparatus.

The plurality of identification portions 12 are formed of the same material as the sheet portion 11.

The plurality of identification parts 12 have different three-dimensional shapes, respectively, in a three-dimensional measurement range of 25.00 mm 2 or more and 625.00 mm 2 or less, for example, in an area that is three-dimensional measured in one shot by the impression taking device. Specifically, the plurality of identification units 12 have outlines that can be identified by the control device, respectively, having different shapes. For example, the plurality of identification units 12 have shapes such as letters, numbers, symbols, drawings, figures, sentences, patterns, symbols, shapes, and combinations thereof.

A figure is various shapes determined by a fixed rule. The figure may be, for example, a rectangular parallelepiped.

4 shows an example of a sentence. As shown in Fig. 4, a sentence is a chairman that identifies and identifies organizations and organizations such as local governments, nations, schools, public institutions, associations (guilds), troops, etc., starting with individuals and households, or It is a design.

5 shows an example of a pattern. As shown in Fig. 5, a pattern is a variety of pictures or shapes that are applied as a decoration to fabrics, dyeing products, and crafts. The pattern may be a figure shown on the surface of an object.

6 shows an example of a symbol. As shown in FIG. 6, a symbol is a symbol having a certain meaning. The symbol may be a figure, a character, a gesture, or the like having a certain meaning.

7 shows an example of a form. As shown in FIG. 7, a form is the shape and shape which looked at the structure | tissue, such as an object or an apparatus from the outside.

In Embodiment 1, the some identification part 12 is formed with the various alphabet letters.

Each of the plurality of identification portions 12 is formed to have a dimension in the thickness direction of the sheet portion 11 of 0.10 mm or more and 3.00 mm or less, and in the longitudinal direction and the width direction when viewed in the thickness direction of the sheet portion 11. The dimension in is formed in 0.10 mm or more and 20.00 mm or less.

In Embodiment 1, although the some identification part 12 demonstrated the example which is arrange | positioned regularly with the space | interval in the X direction and the Y direction of the sheet | seat part 11, however, it is not limited to this. For example, the some identification part 12 may be arrange | positioned at random. In addition, the shape of the identification part which adjoins mutually among the some identification part 12 does not need to be different.

[Manufacturing method of auxiliary apparatus]

An example of the manufacturing method of the auxiliary mechanism 10 is demonstrated using FIG. 8 is a flowchart of an example of a method of manufacturing the auxiliary mechanism 10. As shown in FIG. 8, the manufacturing method of the auxiliary mechanism 10 includes step ST11 which produces a sound mold, and step ST12 which fills and hardens the material which forms the auxiliary mechanism 10 in the produced sound mold.

In step ST11, the sound mold which forms the shape of the auxiliary mechanism 10 is produced. The sound shape is a template for forming the seat portion 11 and the plurality of identification portions 12 of the auxiliary mechanism 10.

For example, the sound mold has a first recessed portion formed in the shape of the seat portion 11 of the auxiliary mechanism 10. The 1st recessed part corresponding to the external shape of the auxiliary mechanism 10 is a part to which the material which forms the auxiliary mechanism 10 is filled. On the bottom surface of the first concave portion, a plurality of irregularities for forming the plurality of identification portions 12 are formed. The plurality of irregularities has a shape corresponding to the shape of the plurality of identification parts 12.

In Embodiment 1, the some identification part 12 is formed with the convex part which protruded in the direction opposite to the direction toward the 2nd surface (lower surface) from the 1st surface (upper surface) of the sheet | seat part 11, respectively. For this reason, the some 2nd recessed part corresponding to the shape of an alphabet letter is formed in the bottom surface of a 1st recessed part. The plurality of second recesses are formed by being recessed in the direction from the first surface of the sheet portion 11 to the second surface on the bottom surface of the first recess.

On the other hand, the plurality of identification portions 12 are formed as recesses which are recessed from the first surface of the sheet portion 11 toward the second surface, or holes communicating with the first surface and the second surface of the sheet portion 11. If present, a plurality of convex portions corresponding to the shapes of the alphabet letters are formed on the bottom surface of the first concave portion. On the bottom surface of the first concave portion, the plurality of convex portions protrude from the second surface of the sheet portion 11 in a direction toward the first surface.

In the production of sound shapes, three-dimensional sound design data is created by a computer. For example, three-dimensional sound design data may be created by three-dimensional CAD (Computer Aided Design). Alternatively, three-dimensional sound design data may be generated by CAM (Computer Aided Manufacturing) software.

Next, a sound form is produced based on the 3D sound design data. For example, a sound mold is produced by a cutting machine or a 3D printer based on the three-dimensional sound design data. Or a sound shape is produced by a laser processing machine, ultrasonic processing, etc. based on 3D sound shape design data.

Three-dimensional CAD is one of the types of CAD that designs and drafts industrial products or buildings, and displays and edits sculptures in three dimensions.

In order to manufacture a product, CAM uses the shape data created in CAD as input data, for example, to perform overall production preparation on a computer, such as a NC program for processing or creation of slice data for processing by a 3D printer. System.

A 3D printer is a device that adds a three-dimensional model of material to a space. High-precision stereoscopic models are completed based on 3D data. Examples of the molding method (3D printing method) of the 3D printer include, for example, material extrusion (heat dissolving layer), liquid photopolymerization (light molding), material injection (ink jet), binder injection, powdery melt bonding, sheet lamination, and directional energy. Deposits, etc. You may arbitrarily select a shaping | molding system according to the material to be used.

Laser processing refers to performing engraving, cutting, drilling, marking on various materials including, for example, metal, wood, leather, etc. by a laser.

Ultrasonic processing refers to a processing method in which abrasive particles are mixed with a processing liquid such as water, interposed between a tool and a workpiece vibrating at high frequency, and the tool performs the impact crushing action applied to the workpiece through the abrasive particles. The frequency of the tool is preferably 15.00 kHz or more and 50.00 kHz or less, and the amplitude is preferably 1.00 탆 or more and 150.00 탆 or less.

The surface of the produced negative mold may be subjected to a surface treatment such as sand blast treatment, petrolatum or silicone separator coating, or the like.

Sandblasting is a processing method in which an abrasive is mixed and sprayed in compressed air. The abrasive is, for example, alumina or glass beads. The air compressor pressure mounted on the sand blaster is preferably 1.00 MPa or more.

The sound mold is made of a material that does not chemically react with the material forming the auxiliary mechanism 10.

In Embodiment 1, in a sound shape, the 1st recessed part corresponding to the shape of the seat part 11 of the auxiliary mechanism 10 is formed in rectangular shape. One side of a 1st recessed part is 50.00 mm or more and 100.00 mm or less, and 40.00 mm or more and 80.00 mm or less, for example. In addition, the depth of a 1st recessed part is designed so that it may become 0.10 mm or more and 3.00 mm or less, for example. For example, a 1st recess may be formed by cutting a plate-shaped member with a cutting machine, or may be formed and provided with a frame on a plate-shaped member.

Moreover, the some 2nd recessed part formed corresponding to the shape of the some alphabet letter corresponding to the some identification part 12 is formed in the bottom face of the 1st recessed part. The depth of each of the plurality of second recesses is, for example, 0.10 mm or more and 3.00 mm or less. The horizontal and longitudinal dimensions of each of the plurality of second recesses are, for example, 0.10 mm or more and 20.00 mm or less. The space | interval of several 2nd recessed parts is 0.10 mm or more and 2.00 mm or less.

In step ST12, the material forming the auxiliary mechanism 10 is filled in the sound mold produced in step ST11 and cured.

Examples of the material for forming the auxiliary mechanism 10 include various compositions, polymer materials, thermoplastic resins, polymer gels, and the like. As various compositions, a dental resin composition, a dental silicone impression material composition, a dental alginate impression material composition, a dental agar impression material composition etc. are mentioned, for example. Examples of the polymer material include a polymer material having elasticity or viscosity such as an optical molding resin, an optical molding rubber like resin, and an optical molding silicone resin. Examples of the thermoplastic resin include thermoplastic resins such as polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, Teflon (registered trademark), ABS resin, AS resin, and acrylic resin. Examples of the polymer gel include a polymer gel such as a double network gel, a nanocomposite gel, and polyrotaxane. In addition, as a material which forms the auxiliary mechanism 10, natural rubber latex, a giant percha etc. are mentioned, for example.

In addition, the material which forms the auxiliary mechanism 10 is mixed with the coloring agent and X-ray contrast agent from which the biosafety was confirmed. A colorant is used, for example, of a color different from the color in the oral cavity. The colorant may be a color capable of three-dimensional measurement by an optical impression acquisition device, and specifically, a color other than black may be used. For example, the colorant may be blue, green, or the like.

In step ST12, the material forming the auxiliary mechanism 10 flows into the sound mold, and is formed while defoaming. For example, the base material and the catalyst material of the additional silicone rubber used in the dental clinic are softened one to one. Next, bubbles are removed with an air gun or the like while injecting the softened silicone rubber into the sound mold. Thereafter, the material is cured by an addition reaction, the burr is removed, and the formation is taken out of the negative mold.

In this way, the auxiliary mechanism 10 can be manufactured by performing steps ST11 and ST12. On the other hand, also about the auxiliary mechanism 10A, 10B of the modification shown in FIG. 2 and FIG. 3, it can manufacture using the manufacturing method mentioned above by changing the shape of a negative shape, ie, the shape of a 1st recessed part.

In step ST12, a thermoplastic resin may be used as a material for forming the auxiliary mechanism 10. In this case, in step ST12, you may manufacture the auxiliary mechanism 10 by injection molding using a thermoplastic resin.

Injection molding means that the thermoplastic resin heated at the temperature to be softened is formed by injecting and filling the negative mold by applying injection pressure.

Examples of the thermoplastic resin include polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, Teflon (registered trademark), ABS resin, AS resin, acrylic resin, and the like. Moreover, it is preferable that the coloring agent and X-ray contrast agent in which the biosafety was confirmed are mixed with the thermoplastic resin.

The injection pressure is preferably in the range of 10.00 kgf / cm 2 or more and 3000.00 kgf / cm 2 or less. It is preferable that the heating temperature of a thermoplastic resin is high in the range of 50.00 degreeC or more and 150.00 degrees C or less than melting | fusing point or glass transition temperature of a thermoplastic resin.

In addition, the manufacturing method of the auxiliary apparatus 10 mentioned above is an illustration and is not limited to these manufacturing methods. The manufacturing method of the auxiliary mechanism 10 can manufacture the auxiliary mechanism 10 including the sheet part 11 and the some identification part 12 formed in the 1st surface (upper surface) of the sheet part 11. That's how it is.

You may manufacture the auxiliary mechanism 10 by a laminated shaping | molding method or a cutting process. For example, three-dimensional design data of the auxiliary mechanism 10 may be created, and the auxiliary mechanism 10 may be produced by the 3D printer based on the three-dimensional design data. Alternatively, the auxiliary mechanism 10 may be produced by cutting with a cutting machine based on the three-dimensional design data.

Another example of the manufacturing method of the auxiliary mechanism 10 is demonstrated using FIG. 9 is a flowchart of another example of the method of manufacturing the auxiliary mechanism 10. The manufacturing method shown in FIG. 9 is a method of manufacturing the auxiliary mechanism 10 of the shape which reflected the information in the oral cavity of a patient.

As shown in FIG. 9, the manufacturing method of the assisting apparatus 10 carries out the three-dimensional design data of the assisting apparatus 10 based on step ST21 which acquires the opening 3D image data in an oral cavity, and the acquired opening 3D image data. Step ST22 to create and step ST23 which manufactures the auxiliary mechanism 10 based on three-dimensional design data are included.

In step ST21, a digital remodeling impression acquisition is performed with respect to the oral cavity region of the patient or model by the impression acquisition apparatus. Digital remodeling impression acquisition means the simple three-dimensional measurement of the three-dimensional shape in the oral cavity by a non-contact optical scanner or the like. Therefore, the three-dimensional image data (hereinafter, referred to as "open-type three-dimensional image data") acquired by digital remodeling impression acquisition may be an accuracy of the degree which can grasp | ascertain the three-dimensional shape in oral cavity generally, and the accuracy of three-dimensional measurement And low precision. For example, in the open-type three-dimensional image data, it is preferable that the error with the measured value of the three-dimensional shape in an oral cavity is 0.00% or more and 30.00% or less.

The three-dimensional measurement method of the impression taking device is, for example, confocal method, active triangulation method, optical coherence tomography method, active waveform sampling method, moire tomography method, combination of stereoscopic and line projection method, stereo imaging and structured light projection method. Combination method etc. can be used. In order to prevent diffuse reflection of teeth, prosthetic devices, and the like during three-dimensional measurement in the oral cavity, titanium dioxide powder may be applied to the three-dimensional measurement site.

In step ST21, the impression taking apparatus is focused on the three-dimensional measured object of the impression taking apparatus, and the impression taking apparatus is scanned along the oral cavity region which is the three-dimensional measured region. In this way, the shape in the oral cavity is continuously three-dimensionally measured to obtain a plurality of three-dimensional image data. The impression taking device transmits a plurality of three-dimensional image data to the control device. The control device receives a plurality of three-dimensional image data and connects the plurality of three-dimensional image data to each other by dedicated software. The connection of a plurality of three-dimensional image data to each other is performed using, for example, the shape (for example, curvature, edge, etc.) of the gum or teeth portion measured in three dimensions as a reference. Thereby, the open-shaped three-dimensional image data which reproduced the general three-dimensional shape in the patient's own oral cavity is acquired.

In step ST21, the impression taking device may acquire three-dimensional image data of the face part and the finger toe in addition to the patient's oral cavity area. The face part is the front part of the head. Specifically, the face part is a part from the tip of the chin to the place where the hair flies in the up and down direction, and means a part between both ears in the left and right direction.

In Embodiment 1, although the example which carried out three-dimensional measurement of the oral cavity area continuously by the impression taking apparatus was demonstrated in step ST21, it is not limited to this. For example, in step ST21, three-dimensional measurement of the oral cavity area may be divided | segmented into multiple times, without continuous three-dimensional measurement by a pulling apparatus.

In step ST22, the three-dimensional design data of the auxiliary mechanism 10 is created using the open-type three-dimensional image data in the oral cavity acquired in step ST21. Specifically, the control apparatus creates three-dimensional design data of the auxiliary mechanism 10 based on the open-type three-dimensional image data in the oral cavity using a program having a 3D modeling function stored in the memory. The control apparatus executes the program stored in the memory based on the input from the user, for example, and creates three-dimensional design data of the auxiliary mechanism 10.

The control device designs the auxiliary mechanism 10 on the three-dimensional shape in the oral cavity reproduced by the program based on the acquired three-dimensional image data in the oral cavity. In this way, the shape of the auxiliary mechanism 10 suitable for the open three-dimensional shape in the oral cavity is modeled. That is, the control device creates data on which the shape of the auxiliary mechanism 10 is reproduced on the open three-dimensional image data.

For example, the control apparatus determines the removal direction, the removal of the undercut portion with respect to the removal direction (hereinafter referred to as "block out"), setting the outline of the sheet portion 11, setting the thickness of the sheet portion 11, The shape, size, number and position of the plurality of identification parts 12 are set. In this way, the control device sets the shape of the auxiliary mechanism 10.

The detachable direction of the auxiliary mechanism 10 is preferably perpendicular to the occlusal plane (an imaginary plane which binds three points of the midpoint of the mesial right angle of the left and right lower second molar centrifugal buccal affinity and the lower middle incisor). It is preferable to remove the undercut in the detachable direction by blocking out the undercut portion based on the detachable direction of the auxiliary mechanism 10 on the data.

Further, the auxiliary mechanism 10 is positioned so that the outer edge portion of the seat portion 11 of the auxiliary mechanism 10 is located below the range of 0.10 mm or more and 1.00 mm or less from the gum edge of the preparation tooth in the open-type three-dimensional image data in the oral cavity. It is desirable to design.

It is preferable that the outline of the assisting device 10 does not exceed the gum buccal mucosa transition portion and the maxillary palate. The thickness of the auxiliary mechanism 10 is preferably 0.10 mm or more and 3.00 mm or less.

It is preferable that each shape of the some identification part 12 is different. In addition, the size of each of the plurality of identification parts 12 is preferably 0.10 mm or more and 20.00 mm or less. When the some identification part 12 is formed by the convex part, each height of each of the some identification part 12 is 0.10 mm or more and 3.00 mm or less. In the case where the plurality of identification portions 12 are formed as recesses or holes, the depth of each of the plurality of identification portions 12 is preferably 0.10 mm or more and 3.00 mm or less. As for the space | interval of several identification part 12, 0.10 mm or more and 20.00 mm or less are preferable.

In this way, the control device models the shape of the set auxiliary mechanism 10 on the three-dimensional image data in the oral cavity reproduced by the opening three-dimensional image data in the oral cavity.

Next, the control apparatus acquires the three-dimensional design data of the auxiliary mechanism 10 by removing the open-type three-dimensional image data in the oral cavity from the data which modeled the auxiliary mechanism 10 by the difference of Boolean operations.

In step ST23, the auxiliary mechanism 10 is produced based on the three-dimensional design data designed in step ST22. Specifically, the auxiliary mechanism 10 is produced by the manufacturing apparatus based on the three-dimensional design data of the auxiliary mechanism 10. A manufacturing apparatus is an apparatus which manufactures the auxiliary mechanism 10, for example, a 3D printer or a cutting machine. The production apparatus is controlled by the control apparatus. In Embodiment 1, the example in which a manufacturing apparatus is a 3D printer is demonstrated.

For example, the control apparatus creates the output data by the CAM software for the 3D printer based on the three-dimensional design data of the auxiliary mechanism 10. Output data is data which can be read by a 3D printer. As output data, slice data etc. are mentioned, for example. The control device sends the output data to the 3D printer.

The 3D printer receives the output data from the control device and manufactures the auxiliary mechanism 10 based on the output data.

In the case of a liquid tank photopolymerization type 3D printer, as a use material, a resin for light shaping | molding, a rubber like resin for light shaping | molding, and a silicone resin for light shaping | molding are mentioned, for example. In the case of an FDM type 3D printer, the material used may be a thermoplastic resin such as polypropylene, polyethylene, polyvinyl chloride, polystyrene, polyvinyl acetate, polyurethane, Teflon (registered trademark), ABS resin, AS resin, acrylic resin, or Polymer gels such as double network gel, nanocomposite gel and polyrotaxane.

As described above, by performing the steps ST21 to ST23, the auxiliary mechanism 10 having a shape reflecting the intraoral information of the patient can be manufactured.

[3D image data creation method using an auxiliary mechanism]

The three-dimensional image data creation method using the auxiliary mechanism 10 is demonstrated using FIG. 10 is a flowchart of an example of a method of creating three-dimensional image data using the auxiliary mechanism 10.

As shown in FIG. 10, in step ST31, the auxiliary mechanism 10 is disposed in the oral cavity. The auxiliary mechanism 10 is disposed in the oral cavity region that is three-dimensionally measured by the impression taking device. Specifically, the auxiliary mechanism 10 is arranged in a model reproduced in the oral cavity of the patient or in the oral cavity of the patient.

The auxiliary mechanism 10 can be processed in accordance with the portion to be measured three-dimensionally in the oral cavity. For example, in the patient's mouth, when it is desired to three-dimensionally measure the portion on which the prosthetic device is mounted, a hole may be formed in the auxiliary mechanism 10 so that the portion on which the prosthetic device is mounted is exposed. Alternatively, in the case where the dental dentition is to be three-dimensionally measured, the auxiliary mechanism 10 may be cut so that the dental dentition portion is exposed.

11A shows a part of an exemplary process of the three-dimensional image data creation method, and shows a state in which the auxiliary mechanism 10 is disposed in the oral cavity of the model 20. As shown in FIG. 11A, the auxiliary mechanism 10 has a hole formed at a position corresponding to the portion of the mounting pins 21a and 21b to which the prosthetic device is mounted in the oral cavity, and the mounting pins 21a and 21b are exposed. It is processed as much as possible.

Thus, in step ST31, the auxiliary mechanism 10 is arrange | positioned in the part which you want to acquire three-dimensional measurement in the oral cavity, ie, the part which wants to acquire three-dimensional image data in the oral cavity.

Returning to FIG. 10, in step ST32, a plurality of three-dimensional image data is obtained by three-dimensional measurement of the oral cavity area in which the auxiliary mechanism 10 is disposed, including the overlapping portions.

11B shows a part of an exemplary process of the three-dimensional image data creation method, and the impression taking device 30 measures three-dimensional oral cavity region of the model 20 on which the auxiliary mechanism 10 is disposed. Indicates the state. As shown in FIG. 11B, the oral cavity region in which the auxiliary mechanism 10 is disposed is continuously three-dimensionally measured at a plurality of points while moving the impression taking device 30 in the oral cavity. As a result, the auxiliary mechanism 10 acquires a plurality of three-dimensional image data measured three-dimensionally together with the shape in the oral cavity.

The impression taking device 30 has three-dimensional measurement of the oral cavity area in succession while including overlapping portions. Therefore, the plurality of three-dimensional image data that are continuously three-dimensionally measured, that is, the two three-dimensional image data that are three-dimensionally measured back and forth, include portions overlapping each other.

The impression acquisition apparatus 30 transmits the acquired three-dimensional image data to a control apparatus.

Returning to FIG. 10, in step ST33, the shapes of the plurality of identification units 12 of the auxiliary mechanism 10 are respectively identified in each of the plurality of three-dimensional image data measured in three dimensions.

Specifically, the control device receives a plurality of three-dimensional image data from the impression acquisition device. Next, the control apparatus detects each feature (for example, irregularities, contours, etc.) of the plurality of identification units 12 in each of the plurality of three-dimensional image data. Thereby, the three-dimensional shape of each of the some identification part 12 imposed on several 3D image data is identified.

In step ST34, one or more identification part 12 which has an approximate shape is specified in the part which overlaps among several three-dimensional image data.

The control apparatus is one or more which have a three-dimensional approximation among the three-dimensional shapes of the several identification part 12 identified in step ST33 in the part which overlaps among several 3D image data measured three-dimensionally continuously. Identification unit 12 is specified.

Specifically, the control device compares the three-dimensional shapes of the plurality of identification units 12 identified in the overlapping portions of two consecutive three-dimensional image data. Thereby, in the overlapping part of two consecutive three-dimensional image data, one or some identification part 12 which has an approximate shape is identified. The approximate shape means that the error is, for example, 30.00 µm or less, preferably 10.00 µm or less, and the three-dimensional shape of the identification portion 12 coincides.

In step ST35, one or more identification part 12 identified in step ST34 is used as a criterion of alignment, and a plurality of three-dimensional image data is positioned.

Specifically, the control device positions the plurality of three-dimensional image data so that three-dimensional shapes of one or the plurality of identification units 12 approximating at overlapping portions of the plurality of three-dimensional image data overlap. For example, the control device may include one or a plurality of identification units 12 so that the contours of three-dimensional shapes of one or more identification units 12 that approximate coincide in portions of the plurality of three-dimensional image data. Position, angle, size, etc. of the three-dimensional shape. Thereby, positioning of several 3D image data can be performed.

In step ST36, a plurality of positioning three-dimensional image data is connected to each other. Specifically, the control device connects a plurality of three-dimensional image data aligned with respect to step ST35.

In this way, by executing steps ST31 to ST36, three-dimensional intraoral image data can be created.

On the other hand, the algorithm used for aligning a plurality of three-dimensional images is as follows. Steps A1 to A4 shown below are performed in steps ST33 and ST34 shown in FIG. 10. In addition, process A1-A4 are performed by a control apparatus.

(Step A1) Among the features such as the voxel itself or the point set of the three-dimensional image data, which of the features is used (setting of the feature space). Specifically, the characteristics (for example, unevenness, contour, etc.) of the identification part represented by information, such as a voxel or a point set, are set as a feature space.

(Step A2) In each of the three-dimensional image data, a range for searching for the feature space set in step A1 is set (setting of a search space).

(Step A3) In each three-dimensional image data, the feature space set in step A1 is detected within the search range set in step A2.

(Step A4) The characteristic (shape) of each three-dimensional image data obtained at step A3 is represented by a correlation function, and the maximum value of the correlation function is calculated (similarity measure). In addition, a correlation function is a function used for evaluation at the time of aligning several 3D image data.

Positioning of the plurality of three-dimensional image data uses, for example, a cross correlation method, and calculates a correlation function between three-dimensional images as a similarity measure. For example, when the first three-dimensional image data is expressed as a function A and the second three-dimensional image data as a function B, the correlation functions of the functions A and B are calculated to obtain the maximum value of the correlation function. The maximum value obtained indicates that the positional relationship between the two three-dimensional image data is most consistent. Thereby, the direction with the highest similarity between the plurality of three-dimensional image data can be detected, and the plurality of three-dimensional image data can be aligned.

In Embodiment 1, as an example, in process A1, the characteristic of an identification part is set as a feature space using a point set. In step A2, when using the rotation angle method, range designation and piece width designation are set. Regarding the parallel movement, the entire search is set at the pixel interval. In step A3, the feature space is detected while rotating the three-dimensional image data using the Euler angle. In step A4, the characteristic of each three-dimensional image data is represented by a correlation function, and the maximum value of a correlation function is calculated. As a correlation function, there exist a normal correlation function, a phase correlation function, the method of taking phase correlation with the weight of the square root of intensity | strength, etc., for example.

In Embodiment 1, whenever two continuous three-dimensional image data of the front and back are acquired, the two three-dimensional image data are aligned.

[3D Oral Region Tomography Data and 3D Oral Image Data Alignment Method]

The method of aligning the three-dimensional oral region tomography data and the three-dimensional intraoral image data using the auxiliary mechanism 10 will be described with reference to FIG. 8. 12 is a flowchart of an example of a method of aligning three-dimensional oral region tomography data and three-dimensional intraoral image data using the assisting apparatus 10 according to Embodiment 1 of the present invention.

As shown in FIG. 12, in step ST41, three-dimensional intraoral image data is created. Specifically, step ST41 executes step ST31 to ST36 shown in FIG. The three-dimensional intraoral image data is three-dimensional intraoral image data measured three-dimensionally together with the assisting device 10.

Alternatively, the three-dimensional intraoral image data may be produced with a dental model by a conventional pulling method. In step ST41, the three-dimensional intraoral image data may be acquired by arranging the auxiliary mechanism 10 on the dental model and performing three-dimensional measurement with a pore desktop scanner.

In step ST42, three-dimensional oral cavity tomography data is acquired by CT scan of the oral cavity area | region where the auxiliary mechanism 10 is arrange | positioned. In this way, the three-dimensional oral cavity tomography data is acquired together with the auxiliary mechanism 10. CT scan is performed by a CT imaging apparatus, for example. On the other hand, the CT imaging apparatus is controlled by the control apparatus, for example.

The CT imaging apparatus transmits three-dimensional oral region tomography data to the control apparatus.

In step ST43, the dimension of 3D oral cavity tomography data and 3D intraoral image data is correct | amended using the some identification part 12 which has a known dimension. Specifically, the three-dimensional oral region tomography data and the three-dimensional intraoral image data of the three-dimensional oral region tomography data and the three-dimensional oral image data so that the dimensions of the plurality of identification units 12 become known dimensions. Enlarge and reduce the dimension to compensate. The known dimension means a predetermined dimension and means an actual dimension of the identification portion 12.

In step ST44, the corrected 3D oral cavity tomography data and 3D intraoral image data are positioned based on the plurality of identification units 12. For example, corrected three-dimensional oral region tomography data and three-dimensional intraoral image data are aligned by the repeated close contact method (ICP method), reference point best fit method, three-point positioning method, and the like.

In this manner, the known dimensions of the identification unit 12 can be used for dimension correction of the obtained three-dimensional oral region tomography data and the three-dimensional intraoral image data. In addition, by performing the dimension correction, more accurate three-dimensional image positioning can be achieved.

On the other hand, in the method of determining the dimensions of the three-dimensional intraoral image data using the three-dimensional oral cavity tomography data in the oral cavity, the auxiliary mechanism 10 is formed of a material to which the X-ray contrast agent is added It is preferable to use what is present.

[Production method of prosthetic device]

In addition, the three-dimensional image data creation method using the auxiliary mechanism 10 mentioned above can also be used as a method of manufacturing a prosthetic apparatus.

The method of manufacturing a prosthetic device includes, for example, a step of producing a prosthetic device based on the created three-dimensional intraoral image data in addition to steps ST31 to ST36 shown in FIG. 10.

In the step of producing the prosthetic device, a prosthetic device suitable for the three-dimensional shape in the oral cavity is produced from the three-dimensional intraoral image data.

Specifically, the step of producing the prosthetic device includes the following steps A11 to A16 in addition to steps ST31 to ST36 shown in FIG. 6.

(Step A11) The created three-dimensional intraoral image data is imported into dental 3D CAD.

(Step A12) Using the dental 3D CAD, the shape of each prosthetic device is designed based on the prosthetic dental design guideline.

(Step A13) 3D data of each designed prosthetic device is exported as STL format data.

(Step A14) STL format data created in the dental CAM software is imported, and cutting data (NC data) or 3D printing data (slice data) is generated according to the machine tool used for the machining.

(Step A15) Cutting or 3D printing is performed using the generated output data (cutting data or 3D printing data).

For example, the processing material for cutting is zirconia, PMMA, wax, composite resin, glass fiber reinforced resin, cobalt chromium alloy, titanium alloy, pure titanium and the like.

For example, 3D printing materials are photoforming resin, resin for FDM system, PEEK, ABS, zirconia, cobalt chromium alloy powder, titanium alloy powder, pure titanium powder, and the like.

(Step A16) After the completion of processing, the rest and the support are removed to adjust and polish. This completes the prosthetic device.

On the other hand, there are various kinds of prosthetic devices such as inlays, crowns, bridges, etc., the manufacturing method can be produced by the above process. The difference is the detailed modeling method in dental 3D CAD.

[effect]

According to the auxiliary apparatus, the manufacturing method of the auxiliary apparatus, and the three-dimensional image data creation method using the auxiliary apparatus according to the present invention, the following effects can be obtained.

The auxiliary mechanism 10 is formed in the thickness direction of the sheet portion 11 from the first portion (upper surface) of the sheet portion 11 and the sheet portion 11 having the first surface and the second surface opposite to the first surface. And a plurality of identification portions 12 each having a three-dimensional shape that can be identified. With such a configuration, when the plurality of three-dimensional image data obtained by three-dimensional measurement of the inside of the oral cavity are connected to each other to create the three-dimensional intraoral image data, the plurality of identification units 12 are connected to each other. It can use as a criterion of alignment. Thereby, the accuracy and precision of the three-dimensional intraoral image data can be improved.

The plurality of identification portions 12 are convex portions protruding in a direction opposite to the direction from the first surface of the sheet portion 11 toward the second surface, and the concave recessed toward the second surface from the first surface of the sheet portion 11. It has the shape of at least one of the part and the hole which communicates the 1st surface and the 2nd surface of the sheet part 11. With this configuration, the plurality of identification units 12 can be easily identified by the control device, so that the plurality of three-dimensional image data can be easily aligned and connected to each other. As a result, the accuracy and precision of the three-dimensional intraoral image data can be further improved.

The shapes of the identification parts adjacent to each other among the plurality of identification parts 12 are different. By such a configuration, since the plurality of identification parts 12 are more easily identified by the control device, the accuracy and precision of the three-dimensional intraoral image data can be further improved.

The plurality of identification parts 12 have at least one shape among letters, numbers, symbols, drawings, sentences, patterns, symbols, and shapes. By such a configuration, since the plurality of identification parts 12 are more easily identified by the control device, the accuracy and precision of the three-dimensional intraoral image data can be further improved.

Each of the plurality of identification portions 12 is formed to have a dimension in the thickness direction of the sheet portion 11 of 0.10 mm or more and 3.00 mm or less, and in the longitudinal direction and the width direction when viewed in the thickness direction of the sheet portion 11. The dimension in is formed in 0.10 mm or more and 20.00 mm or less. By such a configuration, since the plurality of identification parts 12 are more easily identified by the control device, the accuracy and precision of the three-dimensional intraoral image data can be further improved.

The auxiliary mechanism 10 is formed of a material containing a colorant whose biosafety has been confirmed. With such a configuration, the plurality of identification parts 12 can be more easily identified by coloring the color of the auxiliary mechanism 10 to be different from the color in the oral cavity. As a result, the accuracy and precision of the three-dimensional intraoral image data can be further improved.

The auxiliary mechanism 10 is formed of a material to which an X-ray contrast agent is added. With such a configuration, even in the case of CT scan, the shape of the auxiliary mechanism 10 can be three-dimensionally measured.

The sheet | seat part 11 has a rectangular shape whose thickness is 0.10 mm or more and 3.00 mm or less, and the dimension in the longitudinal direction and the width direction is 1.00 mm or more and 200.00 mm or less when viewed from the thickness direction of the sheet part 11. This configuration has the advantage that the auxiliary mechanism 10 is easily disposed in the oral cavity or around the face portion.

In the auxiliary mechanism 10A, the sheet portion 11a has a semicircular shape when viewed in the thickness direction (Z direction) of the sheet portion 11a, and the outer edge portion that is arcuate to the sheet portion 11a is formed of the sheet portion 11a. It is bent from the first face toward the second face. With such a configuration, the shape of the assistive device 10A can be made into a shape corresponding to the shape of the gum of the patient, and the assistive device 10A can be easily disposed in the oral cavity.

In the auxiliary mechanism 10B, the sheet portion 11b is formed to be bent in a U shape when viewed in the thickness direction of the sheet portion 11b, and the sheet portion 11b is formed in the cross section obtained by cutting the sheet portion 11b in the thickness direction. By such a constitution having a concave cross-sectional shape which is recessed in the direction from the second surface of the portion 11b toward the first surface, the shape of the auxiliary mechanism 10B can be made into a shape more corresponding to the shape of the gum of the patient. Thereby, it becomes easier to arrange | position the auxiliary mechanism 10B in oral cavity.

EXAMPLE

As Example 1, the example of the three-dimensional intraoral image data acquired by performing the creation method of three-dimensional image data using the auxiliary mechanism 10 of Embodiment 1 of this invention is demonstrated. As Comparative Example 1, an example in which three-dimensional intraoral image data is created without using the auxiliary mechanism 10 will also be described. On the other hand, in Example 1 and Comparative Example 1, three-dimensional intraoral image data was created by continuously measuring three-dimensional images of the oral cavity of the model with an impression acquisition device and connecting the plurality of three-dimensional image data to each other.

FIG. 13 shows an example of three-dimensional image data created by the three-dimensional image data creation method using the auxiliary mechanism 10 as the first embodiment. FIG. 14 shows an example of three-dimensional image data generated without using the auxiliary mechanism 10 as Comparative Example 1. FIG.

In the first embodiment, as shown in FIG. 13, the plurality of three-dimensional image data three-dimensionally measured by the impression taking device is used as a reference for positioning the plurality of identification units 12 by using the auxiliary mechanism 10. It is used as a connection to each other. Therefore, in Example 1, it turns out that the accuracy of the three-dimensional intraoral image data which showed the shape in the oral cavity of a patient improves.

On the other hand, in the comparative example 1, as shown in FIG. 14, the some 3D image data measured three-dimensionally by the pulling apparatus is connected using the curvature or edge of a gum shape as a reference of alignment. For this reason, in the comparative example 1, when connecting several 3D image data mutually, it may be connected incorrectly. For this reason, in the comparative example 1, it is difficult to improve the accuracy of three-dimensional intraoral image data.

As described above, Example 1 can improve the accuracy of three-dimensional intraoral image data as compared with Comparative Example 1.

Next, in Example 1 and the comparative example 1, the distance between the mounting pins 21a and 21b to which the prosthetic apparatus is mounted is measured, and the error with an actual value is calculated, respectively.

FIG. 15 shows the distance L1 measured in order to evaluate the accuracy of the three-dimensional image data of the first embodiment. Specifically, the three-dimensional image data of Example 1 is three-dimensionally measured using an impression taking device (TRIOS3 oral scanner, 3 Shape), and the obtained data is input by 3D CAD (Rhinoceros 4.0, version 4.0, Robert McNeel & Associates). The distance L1 between the mounting pins 21a and 21b of the three-dimensional image data of Example 1 is measured.

Also in Comparative Example 1, similarly to Example 1, the distance L1 between the mounting pins 21a and 21b of the three-dimensional image data of Comparative Example 1 using the impression taking device (TRIOS3 oral scanner) and 3D CAD. Measure

About the distance L1 between the mounting pins 21a and 21b, Table 1 shows the measured value, the Example 1, and the measurement result of the comparative example 1. FIG.

As shown in Table 1, in Example 1, the difference with the measured value is 0.03 mm. In Comparative Example 1, the difference from the measured value is 0.18 mm. Thus, in Example 1, compared with the comparative example 1, the difference with the measured value becomes small and the accuracy of three-dimensional image data improves.

[Modification]

Next, the auxiliary mechanism of a modification is demonstrated.

[aids]

Fig. 16 is a perspective view showing the auxiliary mechanism 50 of another modification according to the first embodiment of the present invention. 17 shows an example of a state in which the assistive device 50 is mounted on the mouth of a patient. The auxiliary mechanism 50 shown in FIG. 16 and FIG. 17 is comprised so that attachment to the mouth of a patient is possible.

As shown in FIG. 16 and FIG. 17, in addition to the sheet portion 11 in which the plurality of identification portions 12 are formed, the auxiliary mechanism 50 further includes a mouth portion 51, a corner portion 52, and a connecting portion ( 53), a handle portion 54, and a tongue fixing portion 55. The seat portion 11 is connected to the corner portion 52 and extends from the corner portion 52 toward the oral cavity of the patient. On the other hand, the tongue fixing portion 55 is not an essential configuration.

The cleft lip 51 is a member that opens and fixes the patient's lips. Cleft lip 51 is disposed on the upper and lower lip of the patient, respectively. The cleft lip 51 opens the upper lip of the patient upward and lower lip downward, exposing the gum part of the patient. The cleft lip 51 has a shape that fits the lips of a patient. Specifically, the cross-section 51 is formed in a concave shape in cross section.

The corner portion 52 is a member disposed at the junction of the patient's mouth, that is, the upper and lower lip of the patient. The corner part 52 opens and fixes the patient's mouth in left and right directions. The corner portion 52 has a hook shape to fit the mouth of the patient. Specifically, the corner portion 52 is formed in a concave shape in cross section. The corner part 52 is connected by the connection part 53. As shown in FIG.

The sheet portion 11 is connected to the corner portion 52. The seat portion 11 extends from the corner portion 52 toward the mouth of the patient.

The connecting portion 53 is a member connecting the mouth portion 51 and the corner portion 52. The connecting portion 53 is formed of a deformable member. For example, when the cleft 51 and the cleft 52 open the patient's lips and mouth, the connecting portion 53 is deformed. In addition, the connection part 53 maintains the deformed state, thereby fixing the positions of the cleft 51 and the corner 52. In this way, the patient's mouth can be left open.

The handle portion 54 is a portion that can be gripped by the user. The handle portion 54 is connected to the corner portion 52 and is formed of a plate member extending in the direction of opening the patient's mouth from the corner portion 52.

Tongue fixing part 55 is to fix the tongue of the patient. Tongue fixing portion 55 is connected to the corner portion 52.

18 shows another example of a state where the assistive device 50 is mounted in the mouth of a patient. 18, illustration of the tongue fixing part 55 is abbreviate | omitted. As shown in FIG. 18, in the state in which the auxiliary mechanism 50 is attached to the patient's mouth, the seat part 11 which extends from the corner part 52 toward the inside of the patient's mouth is arrange | positioned in the patient's mouth. As a result, when the intraoral cavity is three-dimensionally measured by the impression taking device, the plurality of identification units 12 formed in the sheet portion 11 together with the shape in the oral cavity are three-dimensionally measured. As a result, in the auxiliary mechanism 50, the plurality of three-dimensional image data can be aligned based on the plurality of identification units 12, and the accuracy of the three-dimensional intraoral image data can be improved.

The manufacturing method of the auxiliary mechanism 50 can be manufactured by the same method as the manufacturing method of the auxiliary mechanism 10 mentioned above. For example, the auxiliary mechanism 50 can be manufactured by injection molding or a 3D printer as described above.

On the other hand, in the auxiliary mechanism 50 shown to FIGS. 16-18, although the sheet part 11 was demonstrated the example connected to the square part 52, it is not limited to this. The sheet portion 11 may be connected to the labia 51 and may extend from the labia 51 toward the oral cavity of the patient.

19 is a perspective view showing an auxiliary mechanism 60 of another modification according to the first embodiment of the present invention. The auxiliary mechanism 60 shown in FIG. 19 has an occlusal form. On the other hand, the auxiliary mechanism 60 shown in FIG. 19 is used in the case of upper and lower dentition.

Specifically, the auxiliary mechanism 60 includes a maxillary bite image 70 and a maxillary bite image 80 that is suitable for the maxillary bite image 70. In the embodiment, the maxillary bite image 70 and the mandibular bite image 80 are not integrally formed and can be separated.

The maxillary occlusal image 70 includes a first base upper portion 71 and a first bite mixture 72 connected to the first base upper portion 71.

The first base upper part 71 has a form suitable for the shape of the oral mucosa of the maxilla of the patient. Specifically, the plurality of identification portions 12 extend from the cross section of the first plate and the first plate suitable for the shape of the maxillary oral mucosa of the patient to the oral mucosa of the maxilla of the patient. Has a sheet portion 11 formed thereon.

The first plate is formed of a semicircular plate-shaped member. The top surface of the first plate is in contact with the oral mucosa of the maxilla of the patient. The lower surface of the first plate is connected to the first bite mixture 72.

The sheet portion 11 of the first base upper portion 71 extends from the cross section of the first plate to the oral mucosa side of the maxilla of the patient. The cross section of a 1st plate is a side surface which connects an upper surface and a lower surface in the outer surface of a 1st plate. The cross section of the first plate extends in the direction crossing the upper and lower surfaces of the first plate.

The sheet portion 11 of the first base upper portion 71 is formed in a U shape with the first base upper portion 71 viewed from above. In the state where the auxiliary mechanism 60 is disposed in the mouth of the patient, the seat portion 11 of the first base upper portion 71 is disposed between the lips and the teeth adjustment of the patient.

The first base upper portion 71 is formed of, for example, wax, normal temperature polymerization resin (PMMA), or the like.

The first bite agent portion 72 is disposed on the upper jaw alveoli and is connected to the first plate of the first base upper portion 71. The first bite mixture portion 72 is formed of a plate-like member. Specifically, the first bite agent portion 72 is formed of a semicircular plate-shaped member. The first bite mixture portion 72 extends in the same direction as the direction in which the first plate of the first base upper portion 71 extends. The upper surface of the first occlusal agent 72 is connected to the lower surface of the first plate of the first foundation upper portion 71.

A plurality of identification portions 12 are formed in the cross section of the first occlusal agent portion 72. The cross section of the 1st occlusal agent part 72 is a side surface which connects an upper surface and a lower surface in the outer surface of the 1st occlusal agent part 72. In Embodiment 1, the 1st bite mixture part 72 is formed along the shape of the 1st base upper part 71. As shown in FIG.

The first bite mixture 72 is made of, for example, wax.

The mandibular occlusal image 80 is provided with the 2nd base upper part 81, and the 2nd articulation part 82 connected with the 2nd base upper part 81. As shown in FIG.

The second base upper portion 81 has a shape suitable for the shape of the oral mucosa of the lower jaw of the patient. Specifically, the plurality of identification portions 12 extend from the cross section of the second plate and the second plate suitable for the shape of the lower oral mucosa of the patient to the lower oral mucosa side of the patient. Has a sheet portion 11 formed thereon.

The second plate is formed of a semicircular plate-shaped member. The lower surface of the second plate contacts the oral mucosa of the lower jaw of the patient. The upper surface of the second plate is connected to the second occlusal portion 82.

The sheet portion 11 of the second base upper portion 81 extends from the cross section of the second plate to the oral mucosa side of the lower jaw of the patient. The cross section of a 2nd plate is a side surface which connects an upper surface and a lower surface in the outer surface of a 2nd plate. The cross section of the second plate extends in the direction crossing the upper and lower surfaces of the second plate.

The sheet portion 11 of the second foundation upper portion 81 is formed in a U shape with the second foundation upper portion 81 viewed from below. In the state where the auxiliary mechanism 60 is disposed in the oral cavity of the patient, the seat portion 11 of the second base upper portion 81 is disposed between the lip and the tooth adjustment of the patient.

The second base upper portion 81 is formed of, for example, wax, room temperature polymerization resin (PMMA), or the like.

The second bite agent portion 82 is disposed on the lower jaw alveoli and is connected to the second plate of the second base upper portion 81. The second bite binder portion 82 is formed of a plate-like member. Specifically, the second bite agent portion 82 is formed of a semicircular plate-shaped member. The second bite agent portion 82 extends in the same direction as the direction in which the second plate of the second base upper portion 81 extends. The lower surface of the second occlusal agent portion 82 is connected to the upper surface of the second plate of the second foundation upper portion 81.

A plurality of identification portions 12 are formed in the cross section of the second occlusal agent portion 82. The cross section of the 2nd occlusal agent part 82 is a side surface which connects an upper surface and a lower surface in the outer surface of the 2nd occlusal agent part 82. The first bite mixture portion 72 is formed along the shape of the second base upper portion 81.

The second bite agent portion 82 is made of, for example, wax.

The auxiliary mechanism 60 having the above-described configuration is used for digital occlusal acquisition. On the other hand, the auxiliary mechanism 60 shown in FIG. 15 is an example of the shape used in the case of the upper and lower dentition. The auxiliary mechanism 60 may have a different shape according to the remaining values and the form of the decay mucosa. For example, in the case of occlusal acquisition of a patient in which a tooth remains, the auxiliary mechanism 60 may be a shape having a hole for exposing the tooth to the outside of the auxiliary mechanism 60 without covering the remaining tooth. .

Digital occlusion acquisition using the auxiliary mechanism 60 will be described.

(Step A21) The upper jaw and the lower jaw are three-dimensionally measured by the impression taking device, respectively. Thereby, the upper three-dimensional image data and the lower three-dimensional image data are acquired.

(Step A22) The assistive device 60 is placed in the mouth of the patient. Specifically, the maxillary occlusal image 70 is disposed on the patient's maxilla, and the mandibular occlusal image 80 is disposed on the patient's mandible. On the other hand, the auxiliary mechanism 60 may be a form which exposes a part of the malignant mucosa.

(Step A23) In a state in which the patient is shut up, the occlusion is performed by the impression taking device. Specifically, the impression taking device measures the upper and lower jaw three-dimensionally together with the auxiliary mechanism 60. Specifically, three-dimensional measurement is performed covering the upper and lower jaw portions covered with the auxiliary mechanism 60 and the exposed portions of the malignant mucosa.

At this time, the auxiliary mechanism 60 may be used to determine the center occlusal position, the occlusal plane and the occlusal diameter, wind melting on the vestibular side, writing the reference line of the artificial tooth array, and the like.

(Step A24) Three-dimensional intraoral image data in an occlusal state is created from a plurality of three-dimensional image data acquired by occlusal acquisition. Three-dimensional intraoral image data in an occlusal state can be created by performing steps ST33 to ST36 shown in FIG. 6.

(Step A25) The maxillary and mandibular three-dimensional image data obtained in step 21 and the three-dimensional intraoral image data in the occlusal state obtained in step 24 are aligned by, for example, the repeated close contact method (ICP method).

Through the above steps, digital occlusal acquisition can be performed.

For example, the auxiliary mechanism 60 may be manufactured by the method of fixing the sheet | seat part 11 which has the some identification part 12 with the adhesive etc. on the bite produced by the normal method. The assistive device 60 may acquire open-type three-dimensional image data in the oral cavity, design the assistive device 60 by using a dental 3D CAD, and may produce the same by a 3D printer. Alternatively, the auxiliary mechanism 60 may be produced by a method of fixing the sheet portion 11 having the plurality of identification portions 12 to the replica denture with an adhesive or the like. The duplicate denture means that the three-dimensional image data is acquired by an optical three-dimensional scanner, 3D printed by a 3D printer, or produced by injecting a room temperature polymerization resin into the sound form of the splint.

According to the auxiliary mechanism 60, the accuracy and precision of digital bite acquisition can be improved.

In Embodiment 1, although the example in which the some identification part 12 was formed in the cross section of the 1st bit mixture part 72 of the auxiliary mechanism 60 was demonstrated, it is not limited to this. For example, the sheet portion 11 of the first base upper portion 71 may extend from the cross section of the first plate to the cross section of the first bite mixture 72. In addition, although the example in which the some identification part 12 was formed in the cross section of the 2nd occlusal agent part 82 was demonstrated, it is not limited to this. For example, the sheet part 11 of the 2nd base upper part 81 may extend from the cross section of the 2nd plate to the cross section of the 2nd occlusal agent part 82. FIG.

In Embodiment 1, although the example which the control apparatus which is one computer controls an impression taking apparatus, a CT imaging apparatus, and a manufacturing apparatus was demonstrated, it is not limited to this. For example, the impression taking device, the CT imaging device, and the production device may each be provided with a control device.

In the auxiliary apparatus of the first embodiment described above, a manufacturing method of the auxiliary apparatus, a three-dimensional image data creation method using the auxiliary apparatus, a manufacturing method of the prosthesis using the auxiliary apparatus, and a dimensional determination method using the auxiliary apparatus, Accordingly, components may be added, reduced, split, and integrated.

Although this invention was demonstrated in detail in each embodiment in detail, it is natural that the disclosure of these embodiment changes in the detail of a structure, and the combination of the element in each embodiment, and the change of order are claimed It can be realized without departing from the scope and spirit of the invention.

The auxiliary apparatus, the manufacturing method of the auxiliary apparatus, and the three-dimensional image data creation method using the auxiliary apparatus which concern on this invention can produce three-dimensional intraoral image data with high precision. For this reason, it is useful for the quality improvement and uniformity of the apparatus used for medical and dental treatment, such as the diagnostic diagnosis and prosthetic apparatus, the correction apparatus, the stimulation apparatus, the sprint and the surgical support apparatus in a dental area.

10, 10A, 10B Auxiliary Apparatus
11, 11a, 11b seat
12 identification
13 outer edge
14 center section
20 models
21a, 21b mounting pin
30 impression taking device
50 aids
51 labrum
52 corners
53 connections
54 handles
55 Tongue Fixation
60 aids
70 maxillary occlusion
71 First Foundation
72 First Occlusion
80 mandibular occlusion
81 Second Foundation
82 Second Occlusion System

Claims (13)

A dental assisting device used as a criterion for positioning for connecting three-dimensional image data obtained by three-dimensional measurement of the intraoral cavity to each other to create three-dimensional intraoral image data.
A sheet portion having a first surface and a second surface opposite to the first surface,
And a plurality of identification portions formed in the thickness direction of the sheet portion from the first surface of the sheet portion, and having a plurality of identification portions each having a three-dimensional shape that can be identified. The method of claim 1,
The plurality of identification unit,
A convex portion protruding from a direction toward the second surface from the first surface of the sheet portion;
A recess recessed toward the second surface from the first surface of the seat portion, and
An auxiliary mechanism having a shape of at least one of the holes communicating the first surface and the second surface of the sheet portion. The method according to claim 1 or 2,
Auxiliary mechanisms of which the shape of the identification part adjacent to each other among the plurality of identification parts is different. The method according to any one of claims 1 to 3,
And the plurality of identification parts have a shape of at least one of letters, numbers, symbols, drawings, figures, sentences, patterns, symbols, and shapes. The method according to any one of claims 1 to 4,
Each of the plurality of identification portions has a dimension in the thickness direction of the sheet portion of 0.10 mm or more and 3.00 mm or less, and a dimension in the longitudinal direction and the width direction of 0.10 mm or more and 20.00 mm in the thickness direction of the sheet portion. An auxiliary mechanism formed below. The method according to any one of claims 1 to 5,
An auxiliary apparatus comprising a coloring agent confirmed in biosafety, and formed of a material to which an X-ray contrast agent is added. The method according to any one of claims 1 to 6,
The said sheet part is an auxiliary mechanism which has a rectangular shape whose thickness is 0.10 mm or more and 3.00 mm or less, and the dimension in a longitudinal direction and the width direction is 1.00 mm or more and 200.00 mm or less when viewed from the thickness direction of the said sheet part. The method according to any one of claims 1 to 6,
The sheet portion has a semicircular shape when viewed in the thickness direction of the sheet portion,
The auxiliary mechanism in which the arcuate outer edge part is bent toward the said 2nd surface from the said 1st surface of the said sheet part in the said sheet part. The method of claim 8,
The sheet portion is formed to be bent in a U shape when viewed in the thickness direction of the sheet portion, and in the cross section obtained by cutting the sheet portion in the thickness direction, the concave recessed in the direction from the second surface to the first surface of the sheet portion. An auxiliary mechanism having a cross-sectional shape of the shape. The method according to any one of claims 1 to 7,
Add to,
The labia which open and fix the patient's lips,
A corner portion connected to the cleft lip and the connecting portion and further fixed to open the mouth of the patient;
A handle portion connected to the corner portion and capable of being gripped,
And the seat portion is connected to the cleft lip and / or the angular portion and further extends from the cleft lip and / or the angular portion toward the mouth. The method according to any one of claims 1 to 7,
Add to,
A maxillary occlusal image and a mandibular occlusal image suitable for the maxillary bite image,
The maxillary occlusal image,
A first base upper portion having a first plate suitable for the shape of the oral mucosa of the patient's maxilla and the sheet portion with the plurality of identification portions extending from the cross section of the first plate to the oral mucosa side of the patient's maxilla;
A first occlusal agent disposed on the maxillary alveoli and connected to the first plate of the first base upper portion,
The plurality of identification portions are formed in a cross section of the first occlusal agent portion.
The mandibular occlusal image,
A second base upper portion having a second plate suitable for the shape of the lower mouth oral mucosa of the patient and the sheet portion formed with the plurality of identification portions extending from the cross section of the second plate to the oral mucosa side of the patient's lower jaw;
A second occlusal agent disposed on the lower alveolar and connected to the second plate of the second base upper portion;
The auxiliary mechanism in which the said some identification part is formed in the cross section of the said 2nd articulation agent part. A three-dimensional image data creation method for creating three-dimensional intraoral image data using a dental assistive device,
A sheet portion having a first surface and a second surface opposite to the first surface, and a plurality of identification portions formed in the thickness direction of the sheet portion from the first surface of the sheet portion, and each having a three-dimensional shape that can be identified. Obtaining three-dimensional image data in which the auxiliary apparatus and the shape in the oral cavity are three-dimensionally measured together by three-dimensional measurement of the oral cavity area in which the auxiliary mechanism to be provided includes overlapping portions;
Identifying each of the plurality of three-dimensional image data, each of the shapes of the plurality of identification portions of the auxiliary mechanism;
Specifying one or a plurality of identification units having an approximate shape in the overlapping portions of the plurality of three-dimensional image data,
Positioning the plurality of three-dimensional image data by using the specified one or a plurality of identification units as a reference for positioning;
And creating the three-dimensional intraoral image data by connecting the plurality of aligned three-dimensional image data to each other. As a method of aligning three-dimensional oral region tomography data and three-dimensional intraoral image data using a dental assistive device,
A sheet portion having a first surface and a second surface opposite to the first surface, and a plurality of identification portions formed in the thickness direction of the sheet portion from the first surface of the sheet portion, and each having a three-dimensional shape that can be identified. Obtaining three-dimensional image data in which the auxiliary apparatus and the shape in the oral cavity are three-dimensionally measured together by three-dimensional measurement of the oral cavity area in which the auxiliary mechanism to be provided includes overlapping portions;
Identifying the shapes of the plurality of identification portions of the auxiliary mechanism in each of the plurality of three-dimensional image data,
Specifying one or a plurality of identification units having an approximate shape in the overlapping portions of the plurality of three-dimensional image data,
Positioning the plurality of three-dimensional image data by using the specified one or a plurality of identification units as a reference for positioning;
Creating three-dimensional intraoral image data by connecting the plurality of three-dimensional image data aligned;
Acquiring three-dimensional oral cavity tomography data by CT scanning the oral cavity area in which the auxiliary mechanism is arranged;
In each of the three-dimensional intraoral image data and the three-dimensional oral region tomography data, the three-dimensional intraoral image data and the three-dimensional oral region so that the dimensions of the one or the plurality of identification portions become known dimensions. Correcting the dimensions of the tomography data,
And positioning the corrected three-dimensional intraoral image data and three-dimensional oral region tomography data based on the one or the plurality of identification units.

Images